Electronic switching telephone system



March 1965 a. BRIGHTMAN ETAL 3,176,077

ELECTRONIC SWITCHING TELEPHONE SYSTEM Filed May 21, 1959 104 Sheets-Sheet l LOCAL OFFICE LONG LONG LONG DISTANCE DISTANCE DISTANCE SWITCHING SWITCHING SWITCHING CENTER CENTER CENTER I I x I 3 1 9 LOCAL LOCAL LOCAL OFFICE OFFICE OFFICE I i I 4 LOCAL LOCAL OFFICE OFFICE INVENTORS BARRIE BRIGHTMAN JAMES G. PEARCE MATTHEW P. TUBINIS 8) FIG. M

ATTORNEY March 30, 1965 a. BRIGHTMAN ETAL 3,176,077

ELECTRONIC SWITCHING TELEPHONE SYSTEM 104 Sheets-Sheet 3 Filed May 21, 1959 26 CONTROL DIA LING CONNECTOR TAC-D T R CONTROL CONNECTOR FIG 38 E m 9 f hw m. DS m NF F CONTROL "A" FIGS. 60-68 CALLING TERMINATING TIME STORE TIME STORE FIGS 48-50 FIGS 69-7l March -30, 1965 a. BRIGHTMAN ETAL 3, 7

ELECTRONIC SWITCHING TELEPHONE SYSTEM Filed May 21, 1959 104 Sheets-Sheet 4 I L I CONTROL CONNECTOR FIG. 38

INCOMING REGISTER TWO men STORE REGISTER ALLOTTER 83 88 FIGS. 4l-42 CALLING TIME STORE FIGS. 48-50 REGISTER FINDER FIGS.-4344 FIG.2C

March 30, 1965 B. BRIGHTMAN ETAL 3,176,077

ELECTRONIC SWITCHING TELEPHONE SYSTEM Filed May 21, 1959 104 Sheets-Sheet 5 Gama R EGISTER H658 FIVE DIGIT STORE FIGS. 5l-59 CONTROL"B" FlGS.72-T9 POSITION TIME STORE FIGSfBO-BZ March 30, 1965 a. BRIGHTMAN ETAL 3,175,077

ELECTRONIC SWITCHING TELEPHONE SYSTEM 104 Sheets-Sheet, 6

Filed May 21. 1959 DETECTOR RING TRIP DETECTOR LINK ALLOTTER I RELEASE SCANNER l i SCANNER I l l l l RELEASE ROUTE SELECTOR CONTROL CONNECTOR u U c R O Ru 0 m. m a w s M 8 F E T U 0 R Mal'dl 30, 1965 B. BRIGHTMAN ETAL 3,176,077

ELECTRONIC SWITCHING TELEPHONE SYSTEM Filed May 21, 1959 104 Sheets-Sheet v LINK CONNECTOR CALL FINDER F|G$.II4|I6 FIG.I25

POSITION COUPLING CIRCUIT FIG.I24

LINK CIRCUIT FIGS-H7423 KEYBOARD CIRCUIT FIGS. I26-l27 Mardl 1965 B. BRIGHTMAN ETAL ELECTRONIC SWITCHING TELEPHONE SYSTEM Filed May 21, 1959 AUDIO AMPLIFIER-AUA PIC-3.35

AUDIO AMPLIFIER-AUG 104 Sheets-Sheet 8 March 1965 B. BRIGHTMAN ETAL 3,176,077

ELECTRONIC SWITCHING TELEPHONE SYSTEM Filed May 21, 1959 104 Sheets-Sheet 9 CONVERTER CVB CVB "\J B0 oA FIGJA EMITTER FOLLOWER-EFC EMITTER FOLLOWER-EFD EFC '1 EFD ll 5 A B a A B +|2 A FIG 8A FIG 88 FIG 9A FIG 9B EMITTER FOLLOWER-EFE EMITTER FOLLOWER-EFJ EFE +I2 FIGJZA FIGJZB FLIP-FLOP-FOA FIG.I3A FIG.I3B

March 30, 1965 B. BRIGHTMAN E TAL ELECTRONIC SWITCHING TELEPHONE SYSTEM Filed May 21, 1959 FOB FlGrWA FLIP-FLOP -FOB 104 Sheets-Sheet 10 GATE-GGA FIG.|5B GATE-GJD B GJF AUDIO GATE-GVB GVB B B INVERTER-INC l2 INC B A A B FIG.2OA

c FIGJBB INVERTER-INA INA A2 +|2 c A B A INVERTER-IND March 30, 1965 Filed May 21, 1959 HIGH SPEED INVERTER-1N6 ms 8 8 v Eli-2% INVERTER-INS INS FIG.24A

INX

LAB

FIG.27A

B. BRIGHTMAN ETAL 3,176,077

ELECTRONIC SWITCHING TELEPHONE SYSTEM 104 Sheets-Sheet 11 INVERTER-INK FIG.22B F|G.23A FIG.23B

INVERTER-INU EQUALIZER LAB FIG.27B

March 30, 1965 B. BRIGHTMAN ETAL ELECTRONIC SWITCHING TELEPHONE SYSTEM 104 Sheets-Sheet 12 Filed May 21, 1959 MONOSTABLE MU LTIVIBRATOR MAA o T MAA B c I00 MS C FIG.28A F|G.28B

HOLDOVER cmcun MMD MD NEGATIVE A HOLD B {-05 HOLDING OVER PULSES H2 +12 FIG.29A FIG.29B

HIGH SPEED AMPLIFIER- PUH 4 PUH F|G.3OA FIG.3OB

HiGH SPEED AMPLIFIER- PUJ PUJ March 1965 a. BRIGHTMAN ETAL 3,176,077

ELECTRONIC SWITCHING TELEPHONE SYSTEM I Filed May 21, 1959 104 Sheets-Sheet 13 HIGH SPEED AMPLIFIER-PUM +|2 PUM O C l2 FIG.32A F|G.32B

INTEGRATOR TRIGGER-STA STA B INT. A

' -|2 F|G.33A FIG.33B

LOW PAss FILTER-FLN 3402 FL" B W A B LPF oA 340! 6 E T I T c .-FIG.34A 1 FIG.34B

PHASE SPLITTER-APA APA N A c I "U B 0' 5 FlG.35A FIG.35B

March 30,

Filed May 21, 1959 104 Sheets-Sheet 14 TIME POSITION Bi HIGHWAY ASSIGNMENT HIGHWAYS TIME SLOT 2 3 4 5 6 Ho LOCAL TRKS. LOCAL TRKS. LOCAL TRKS. LOCAL TRKS. LOCAL TRKS. LOCAL TRKS.

|-|o u-zo 21-30 3l-4O 41-50 5l-60 SERVICE um: SERVICE LINE SERVICE um: SERVICE LINE H 0| 02 O3 04 SPARE SPARE was Lo. TRKS. L.D.TRKS. L.D.TRK5. L.D.TRKS. 1.4). TRKS. L.D.TRKS.

l-l7 l8-34 35-5: 52-68 69-85 86-100 29 ANNTOAUP'ECER TRK l iP-ii TRK EQPM TRK ESR P-s TRK kP-i TRK b-l TRK GRR 2 TAPE T.A. BUSY MARK BUSY MARK ANNOUNCE TRK.GRR-9 SPARE SPARE SERVICE LINES LOCAL TRKS.

TRK.GRP8

UNASSIGNED 32 TEST PIC-3.36

March 30, 1965 Filed May 21, 1959 LINE TERMINATING UNIT Sheets-Sheet 15 E3103-u FLN BOG B A B BLK.0SC. A SDI C 1 RECEIVE 1 Is7o4-1f c 370! C D In 1 I U C Lt TPI Q TOMX. U 1 I 4 PULSE GEN. g 0 g FLN 3706 c 0 3705 o AUA B B BLK.OSC. l- D A LPF GATE SEND c BOG FIG.37

CONTROL CONNECTOR To HIGHWAY I To HIGHWAY 6 I u: f 8 3 i l J.

BOG 380l L BOG 3ao2 A smosc. B A BLK.OSC. B

GATE GATE o c 0 c 59' A 5* B GGA a GGA g9 nan: A A 8 I 1FHI 5H HI-G o u L- w TO HIGHWAY I TO HIGHWAY s CE 5 i i LLI I U l flo 6: I l "n: l o0 BOG BOG A BLK.OSC. B A BLK.OSC. B GATE I, GATE g I FLN C D C 3 04 D C 3803 A LPF B B GGA a GGA 3807 March 1965 B. BRIGHTMAN ETAL 3,176,077

ELECTRONIC SWITCHING TELEPHONE SYSTEM Filed May 21, 1959 104 Sheets-Sheet 16 TO RE 5.8: Ll K CCT G N S 3922 TO CONTROL SEIZE CONNECTOR AC-SD SIGNAL DETECTOR FOR SEIZE DET.

ms ui B '57. A g GGA x we B 3918 Z BT-e a A 4 c GJD GGA 3906 MM 39m Y rd i B A E A C I; I g lOOus I g n: IING 39m 5 3901 D BT-l a A g r) saw a: GGA O m GGA E D c GGA i E D c s FIG.39 3908 T 3904 U SEIZE DETECTOR TO CONTROL CONNECTOR CONTROL CIRCUIT FOR SEIZE DET.

March 30, 1965 B. BRIGHTMAN ETAL 3,176,077

ELECTRONIC SWITCHING TELEPHONE SYSTEM 104 Sheets-Sheet l7 Filed May 21 T0 0.0. REG.

T0 SLOT T0 CONTROL PULSE REGEN. CONN. FOR

CIRCUIT TO INC REG ALLOTTER ALLOTTER SEIZE DET- A 2mm wwJDm MMJEEDE 0k TO INC. REG. ALLOTTER DRCD - TO D D REG ALLOTTER FIG. 40

SEIZE DETECTOR CONTROL CIRCUIT March 1965 B. BRIGHTMAN ETAL 3,

ELECTRONIC SWITCHING TELEPHONE SYSTEM 104 Sheets-Sheet 18 Filed May 21, 1959 n N u n N A CN Q T W E s ZOE OEOR TR D D A r L G I l l I l l I I l l l l I l I l l I I l ll -lllllllllll ll 6 m 34 A n M C H1 R D o E E I OI N T E lllllllllll /J Ulll. llllllllll IIIIIJ G E HA A n A N A D F 0 m u m a 4 s s M m G- D A m C A F M W 1, /7 9 0 s n a m A m B: A A D A A A A G J N A G G I G G N G G I B B 7 B E .3. B as B c A K R Tx C D A D D W W W 6 7 6 all l W O O mG 4 I l R0 AB A 4 4 E0 um B 0R D T D r llllllllllllllllllllllllllllllllllllllllll ll TO SEIZE DETECTOR CONTROL CIRCUIT FIG.4|

REGlSTER ALLOTTER B.BRIGHTMAN ETAL 3,176,077

ELECTRONIC SWITCHING TELEPHONE SYSTEM March 30, 1965 104 Sheets-Sheet 19 Filed May 21, 1959 INPUT BLOCK CCT.

GJD

TO LINK ALB ALLOTTER GGA es i c B INC m D O F l a B 4 3 m G 4 BC 5 B C O 2 4 MA Q A I. wd mm G2) G 4 r 1 w I A R E R ZR v 0 om U U 0C CTC R M N OH CHOU T W0 6.25 ICDR FIG.42

REGISTER ALLOTTER March 30, 1965 a. BRIGHTMAN ETAL 3,176,077

ELECTRONIC SWITCHING TELEPHONE SYSTEM 104 Sheets-Sheet 20 Filed May 21, 1959 TO SCANNER GENERATOR N E N G A LJI w 9 T1 22: s G E R fi A DJ lllllllllllllllllllll lldlllL u n I lllll II III] III] lllllllllllllllllllll ll J M n A F G A M G G 0 u 3 m B w 14v M m I 4 5 r? G M n E D A O R G J 9 B A G A w A L S 8 w A 4 C A B A I G A G J N G G G B C G G I C E G LJI OT L W B7 B7 2/ B A 1.. a w m I v m O 3 7 6 7 w w w. R 3. B 4 4 FIG.43

REGISTER FINDER 

5. IN TELEPHONE SYSTEM, FIRST AND SECOND OFFICES INTERCONNECTED BY A PLURALITY OF TRUNK LINES, A PLURALITY OF LINE TERMINATING UNITS IN SAID FIRST OFFICE INCLUDING A GROUP OF UNITS INDIVIDUALLY TERMINATING SAID TRUNK LINES, A REGISTER AND A LINK CIRCUIT IN SAID FIRST OFFICE, A MULTICHANNEL TRANSMISSION NETWORK IN SAID FIRST OFFICE, MEANS FOR INDIVIDUALLY ASSIGNING THE CHANNELS OF SAID NETWORK TO SAID UNITS, MEANS FOR CONTROLLING SAID REGISTER TO STORE THE IDENTITY OF THE CHANNEL ASSIGNED TO A UNIT WHEN A CALL IS INITIATED ON THE LINE TERMINATED BY THAT UNIT AND TO THEREAFTER REGISTER LINE SELECTING SIGNALS RECEIVED OVER THAT THE CHANNEL, MEANS RESSPONSIVE TO THE REGISTRATION OF THE ONE OR MORE SIGNALS IDENTIFYING SAID GROUP OF UNITS FOR SELECTING AN IDLE UNIT IN SAID GROUP, MEANS FOR CONTROLLING SAID REGISTER TO STORE THE IDENTITY OF THE CHANNEL ASSIGNED TO THE SELECTED UNIT AND TO THEREAFTER TRANSMIT OVER THAT CHANNEL AND THUS TO THE SECOND OFFICE SIGNALS CORRESPONDING TO ALL LINE SELECTING SIGNALS RECEIVED OVER THE CALLING UNIT CHANNEL SUBSEQUENT TO THE RECEIPT OF THE ONE OF MORE SIGNALS IDENTIFYING SAID GROUP OF UNITS, MEANS IN SAID REGISTER FOR READING OUT AND FOR CONTROLLING SAID LINK CIRCUIT TO READ IN AND STORE THE IDENTITIES OF THE CHANNELS ASSIGNED TO THE CALLING AND SELECTED UNITS WHEN SUFFICIENT SIGNALS HAVE BEEN TRANSMITTED TO SAID SECOND OFFICE TO COMPLETE A CONNECTION IN THAT OFFICE, AND MEANS IN SAID LINK CIRCUIT FOR COMPLETING A COMMUNICATION CONNECTION BETWEEN CHANNELS WHEN THE IDENTITIES OF THOSE CHANNELS ARE STORED IN SAID LINK CIRCUIT. 